Oiling device



R. o. ALLEN OILING DEVICE Fam 2, w46.

Filed Jan. 51, 1959 www,

HIS ATTORNEY UNITED DFFCE OILING DEVICE Roy 0. Allen, Athens, Pa., assigner to Ingersoll- Rand Company, Jersey City, N. J., a corporation of New Jersey Application January 31, 1939, Serial No. 253,801

1 Claim. (Cl. 184-55) This invention relates to uid actuated tools, an oil reservoir 34 which encircles, in the presand more particularly to an oiling device for uid ent instance, the portion of the casing dening actuated tools of the hammer type, as for examthe passage 3|. At the upper end of the oil resple rock drills. ervoir 34 is an opening 35 for the introduction of One ob-ject of the invention is to simplify the oil into the reservoir and said opening is nor- 5 matter of supplying oil to the movable parts of mally closed by a plug 36. the tool. In the front end of the reservoir 34 is a rib Another object is to introduce the oil into the 3l having a bore 38 which cooperates with the pressure fluid stream at a point closely adjacent reservoir through a port 39 in the rib. The bore the fluid actuated elements of the tool. 38 extends entirely through the casing and com- 10 Other objects Will be in part obvious and in prises an enlarged portion 40 that is normally part pointed out hereinafter. closed by a plug 4i and a reduced portion 42 into In the drawing accompanying this speciica- Which the port 39 opens. A port I9 in the casing tion and in which similar reference numerals affords communication between the enlarged por- 14 refer to similar parts, tion 40 and the supply chamber 32.

Figure 1 is an elevation, partly in section, oi The reduced portion 42 of the bore 38 serves a iluid actuated tool of the hammer type equipped as a guide for a plunger 43 which is reduced in with an oiling device constructed in accordance the longitudinal plane of the port 39 to provide with the practice of the invention, and a stem 44 that extends into the enlarged portion Figure 2 is a similar View taken through Figure 4t1 of the bore. The stem 44 carries a valve 45 20 l on the line 2--2. which seats against a seating surface 46 at the Referring more particularly to the drawing, 2t end of the reduced portion 42 of the bore to designates, in general, a fluid actuated percuscontrol communication between the portions 42 sive tool, as for example a tie-tamper, and 2l and 40.

the tool casing to the rear end of which is con- The valve 45 may consist of rubber and is 25 nected a hollow rod 22 which may serve as a clamped between rigid washers 4l and 4B byanut handle and also as a conduit for conveying pres- 49 threaded on the stem A spring 5D interposed sure fluid to the 13001, between the plug 4| and the nut 49 normally The casing 2| is bored to provide a piston maintains the valve 45 seated against the seating :lo chamber 23 for the accommodation of a hammer surface 46. 30

piston 24 reciprocable in the piston chamber 23 The plunger 43 is of such length that when the to actuate a working implement (not shown). valve 45 is in closed position the outer end of Adjacent the rearward end of the piston chamthe plunger will be flush with or protrude only ber 23 is a valve mechanism to eiTect the disslightly from the casing 2|. A depression 5l is y.; tribution of pressure fluid to the piston chamber preferably formed in the casing around the outer 23 for actuating the piston. end of the plunger to permit the entrance of the The valve mechanism shown comprises a pair finger actuating the plunger. of plates 25 and 26 of which the latter is re- In the operation of the device and with the cessed to provide a valve chamber 2l for a dispneumatic tool 2@ in its normal operating posi- 4,) tributing valve 28. The distributing valve is of tion oil will flow from the reservoir through the the Well known oscillatory plate type of which port 3S into the portion of the bore 38 encircling the wings control inlet passages 29 and 33 leadthe stem 44. Whenever it is considered advising to the rear and front end, respectively, of the able to introduce oil to the distributing and perpiston chamber 23. cussive elements of the tool the plunger 43 is The pressure uid distributed by the valve 28 actuated toward the plug 4I by pressure applied 45 is conveyed to the valve chamber by a passage against the exposed end of the plunger.

3l, in the casing 2l, opening into a supply cham- This is preferably done while the tool is idle ber 32 rearwardly of the valve mechanism, and and immediately before an operating period. passages 33 in the plate 26 afford communication The oil encircling the stem 44 will then be trans- 56 between the supply chamber 32 and the valve ferred into the enlarged portion 40 of the bore 50 chamber 21. whence the oil ows through the port I9 into The oiling device, constructed in accordance the supply chamber 32. The plunger 43 is then with the practice of the invention, is located in released and will be immediately returned to a the rearward end of the casing 2l between the position in which the valve 45 again closes the rod 22 and the valve mechanism. It comprises reduced portion 42 of the bore. 55

The oil thus introduced into the supply chamber will flow through the passages 33 into the valve chamber and when the tool is again set in operation the pressure uid owing through the valve chamber will convey the oil to all the different surfaces to which the pressure fluid has access including, of course, the piston chamber 23.

I claim:

In an oiling device for fluid actuated tools, the combination of a casing and fluid actuated means in the casing, a channel in the casing for conveying pressure fluid to the uid actuated means,

a reservoir in the casing for oil and having a port, a chamber in the casing between the channel and the reservoir having an enlarged portion and a reduced portion, the reduced portion communieating with the port, a port to afford communication between the enlarged portion and the channel, a spring-opposed manually operable plunger in the chamber for periodically supplying oil from the reduced portion to the enlarged poi tion, and a Valve on the plunger to control commumcation between the said portions of the chamber,

ROY O. ALLEN. 

